Curt has 12 models in all. Three of the models are airplanes. Curt has 5 more modelater of cars than boats. How many models of cars does Curt have?

Let the of model boats =B

The number of model cars =B + 5

 

B + B + 5 + 3 =12

2B=12-5-3

2B=4 divide both sides by 2

B=2 number od model boats

2+5=7 number of model cars, so that:

2+7+3=12